# init(semantic:compression:mipmapsMode:) Creates a texture creation options structure. ``` init(semantic: TextureResource.Semantic?, compression: TextureResource.Compression, mipmapsMode: TextureResource.MipmapsMode = .allocateAndGenerateAll) ``` ## Parameters `semantic` The intended use of the texture resource. `compression` Compression to be applied to the texture. `mipmapsMode` Whether to automatically allocate or generate mipmaps. ## Discussion The `semantic` value you pass tells RealityKit how you plan to use the texture data from this resource. For example, passing [`TextureResource.Semantic.color`](/documentation/RealityKit/TextureResource/Semantic-swift.enum/color) lets RealityKit know you’re using the texture to pass perceptual color information to the shaders, such as for providing a UV-mapped base color for physically based rendering materials. Passing [`TextureResource.Semantic.raw`](/documentation/RealityKit/TextureResource/Semantic-swift.enum/raw) tells RealityKit to pass the pixel values with as little processing as possible. If semantic is `nil`, RealityKit tries to infer a semantic from the texture’s source data. If it’s unable to determine a semantic from the texture source data, it will infer a semantic from the texture’s usage. Providing a value for `semantic` ensures that RealityKit passes the texture resource exactly as you intend. > Note: RealityKit only takes embedded color space data into account when rendering a texture if you pass > ``doc://com.apple.RealityKit/documentation/RealityKit/TextureResource/Semantic-swift.enum/color`` for `semantic`. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)